Finance category

Mortgage, loan, investing, tax, and money calculators.

Cash Reserve Calculator

Size the cash reserves you need to survive vacancy, capital expenditures, and an eviction cycle without panic-selling the property or tapping high-APR debt.

Monthly PITI

Principal, interest, tax, insurance.

Monthly operating expenses

Months of reserve

Lender & landlord common target: 3–12 months.

Property value

Capex buffer (% of value)

Roof, HVAC, water heater, etc.

Eviction / make-ready buffer

Current cash on hand

Target cash reserve

$25,050

months + capex + eviction buffer

Months of expenses

$16,800

Capex buffer

$3,250

Gap to fund

$17,050

32% of target funded

Why cash reserves matter

Thin reserves are the #1 reason landlords are forced to sell in a downturn. One unexpected HVAC replacement, a bad tenant eviction, or two months of vacancy during a soft rental market can wipe out a year of cash flow. Build reserves before buying the next deal, not after the first surprise.

Rate-and-term DSCR and conventional lenders often require 3–12 months of PITI in reserves to close. Always check the lender's worksheet.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

How this calculator works

What this page estimates

This Cash Reserve Calculator is built to give a quick, browser-based estimate for cash reserve. Size the cash reserves you need to survive vacancy, capital expenditures, and an eviction cycle without panic-selling the property or tapping high-APR debt. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.

Calculation approach

The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.

Example workflow

For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.

Practical checks

Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
Run a low, base, and high case when the inputs are estimates.
Check the related calculators below when the next decision depends on a different assumption.

How to interpret the cash reserve result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this cash reserve estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter monthly PITI (principal, interest, tax, insurance) and monthly operating expenses.
Enter the number of months of reserve you want — 6 months is a common baseline, 12 for higher-risk assets.
Add a capex buffer as a percent of property value for big-ticket replacements.
Add an eviction / make-ready buffer to cover a worst-case turnover.
Compare the target to current cash on hand to see how much more you need.

Frequently Asked Questions

How many months of reserves should a landlord hold?

Most conservative landlords aim for 6–12 months of PITI plus operating expenses per door. Beginners should err on the high side. Lenders often require 3–12 months of PITI to close a rental loan.

Should reserves be per property or for the whole portfolio?

For small portfolios, reserve per property. For larger portfolios, pool reserves because losses and vacancies diversify. Lenders, however, usually require per-property reserves at origination.

What's a realistic eviction buffer?

Full eviction can cost $3,000–$10,000+ including unpaid rent, legal fees, turnover costs, and lost rent during make-ready. A $5,000 buffer is a reasonable baseline for a single-family rental.

Where should reserves live?

High-yield savings or money market funds. Avoid tying reserves up in equities — the correlation with landlord stress (recession, job loss, soft rent market) is exactly when equities drop. Reserves must be liquid and stable.